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Investment Securities - Schedule of Gross Gains and Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 2,402,673	$ 2,400,781
Gross unrealized gains	12	3
Gross unrealized losses	(298,401)	(367,982)
Fair value	2,104,284	2,032,802
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized cost	10,000	10,000
Gross unrealized gains	0	0
Gross unrealized losses	(30)	(110)
Fair value	9,970	9,890
Agency bond securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	238,184	240,628
Gross unrealized gains	0	0
Gross unrealized losses	(30,208)	(38,132)
Fair value	207,976	202,496
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,125,665	2,121,037
Gross unrealized gains	12	3
Gross unrealized losses	(262,288)	(323,467)
Fair value	1,863,389	1,797,573
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized cost	28,824	29,116
Gross unrealized gains	0	0
Gross unrealized losses	(5,875)	(6,273)
Fair value	$ 22,949	$ 22,843

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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